<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header :addNewTodoHandle="addNewTodoHandle" />
      <List
        :todoList="todoList"
        :deleteHandle="deleteHandle"
        :changeHandle="changeHandle"
      />
      <Footer
        :todoList="todoList"
        :changeAllTodoHandle="changeAllTodoHandle"
        :sum="sum"
        :ischecked="ischecked"
        :deletereadytodoHandle="deletereadytodoHandle"
      />
    </div>
  </div>
</template>

<script>
import { v4 as uuidv4 } from "uuid";
import Header from "./components/Header";
import List from "./components/List";
import Footer from "./components/Footer";
export default {
  name: "App",

  components: {
    Header,
    List,
    Footer,
  },
  data() {
    return {
      todoList: JSON.parse(localStorage.getItem("todoList") || "[]"),
      sum: 0,
      ischecked: false,
    };
  },
  methods: {
    addNewTodoHandle(value, e) {
      // console.log(value,e,'value');
      this.todoList.unshift({ id: uuidv4(), thing: value, done: false });
      e.target.value = null;
      localStorage.setItem("todoList", JSON.stringify(this.todoList));
    },
    deleteHandle(id) {
      this.todoList = this.todoList.filter((item) => {
        return item.id !== id;
      });
    },
    changeHandle(id, e) {
      // console.log(e.target.checked);
      this.todoList = this.todoList.map((item) => {
        if (item.id === id) {
          item.done = e.target.checked;
        }
        return item;
      });
    },
    changeAllTodoHandle(e) {
      this.todoList = this.todoList.map((item) => {
        item.done = e.target.checked;
        return item;
      });
    },
    deletereadytodoHandle() {
      this.todoList = this.todoList.filter((item) => {
        return item.done != true;
      });
    },
  },
  watch: {
    todoList: {
      deep: true,
      handler(newValue) {
        this.sum = newValue.reduce((prev, item) => {
          if (item.done === true) {
            prev++;
          }
          return prev;
        }, 0);
        if (this.sum === this.todoList.length && this.sum != 0) {
          this.ischecked = true;
        } else {
          this.ischecked = false;
        }
      },
    },
  },
};
</script>

<style >
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>